A nice IPv6 to PTR record online calculator ( if you ignore the typo of “to to” within the header )
A MAC address to IPv6 link-local address online converter
Some good test web server
http://test-ipv6.com/ - Gives a lot of information about your IPv6 but not always correct.
http://www.kame.net/ - Here you should see a swimming turtle if you are IPv6 ready.